Magnetism and transport in transparent high-mobility BaSnO3 films doped with La, Pr, Nd, and Gd

Abstract

We have explored the effect of magnetic rare-earth dopants substitutionally incorporated on the Ba sites of BaSnO 3 in terms of electronic transport, magnetism, and optical properties. We show that for Ba 0.92 R 0.08 SnO 3 thin films (where R = La, Pr, Nd, Gd), there is a linear increase of mobility with carrier concentration across all doping schemes. La-doped films have the highest mobilities, followed by Pr-and Nd-doped films. Gddoped samples have the largest ionic size mismatch with the Ba site and correspondingly the lowest carrier concentrations and electron mobilities. However, crystallinity does not appear to be a strong predictor of transport phenomena; our results suggest that point defects more than grain boundaries are key ingredients in tuning the conduction of BaSnO 3 films grown by pulsed laser deposition. Pronounced, nonhysteretic x-ray magnetic dichroism signals are observed for Pr-, Nd-, and Gd-doped samples, indicating paramagnetism. Finally, we probe the optical constants for each of the BaSnO 3 doping schemes and note that there is little change in the transmittance across all samples. Together these results shed light on conduction mechanisms in BaSnO 3 doped with rare-earth cations.

Chemical Synthesis of La0.75Sr0.25CrO3 Thin Films for p-Type Transparent Conducting Electrodes

“…This is also reflected on the residual resistivity ratio (RRR) calculated from ρ­(300 K)/ρ­(150 K) resulting in smaller values (0.024) than MBE films . The same trend has been reported for other CSD-processed n -type TCO perovskite thin films when compared to their vacuum-processed counterparts. ,,,,, …”

“… 24 The same trend has been reported for other CSD-processed n -type TCO perovskite thin films when compared to their vacuum-processed counterparts. 33 , 35 , 36 , 38 , 52 , 53 …”

Tungsten-doped barium stannate as a transparent conducting film

“…However, most studies have focused on rare-earth element doping at the Ba sites, leading to a significant decline in transmittance in the NIR region. 11,12 Doping at the Sn site may be a judicious choice, as lower optical absorption coefficients have been observed in Sn site doping in BSO ceramics. 13,14 Besides, an increased optical band gap was observed in Sb-doped BSO nanocrystals when compared to the La-doped BSO, which is beneficial for broadening a transparency window across the entire spectrum for BSO.…”

Studies on the structure, optical, ac conduction mechanism by OLPT model and impedance spectroscopy of La-doped Ba2SnO4 Ruddlesden Popper Oxide

“…BaSnO3 system [23][24][25][26][27][28][29][30]. Among the investigated papers, following are the investigations; K. K. James et al prepared the thin film of La-doped BaSnO3 at fused silica substrate using laser ablation, and found a progressive increase in conductivity up to 9 Scm -1 with incorporation of 7 at % La at Ba-site [27].…”